LA71586M
No.A0223-7/50
Continued from preceding page.
Ratings
Parameter
Symbol
In
Out
Conditions
min
typ
max
Unit
REC AFC pull-in
range (1)
fAFC1
T38A
T62
Input a 300mVp-p, 15.6kHz, 5
s width pulse train
(negative polarity).
After increasing the pulse train frequency until the
T62 wave form is disrupted, decrease the frequency
until the T62 wave form returns to normal and let f1 be
that frequency.
fAFC1 = f1-15.625 (kHz)
1.0
kHz
REC AFC pull-in
range (2)
fAFC2
T38A
T62
With the initial conditions of the previous item,
decrease the pulse train frequency until the output is
disrupted, then increase the frequency until the
output returns to normal, and let f2 be that frequency.
fAFC2 = f2-15.625 (kHz)
-2.5
-1.0
kHz
The ratio of the REC
chroma level and FM
modulator output level 1
PAL MODE
C/FM1
T38A
T72
T12
The ratio of 100% chroma’s level which was
converted to low band and FM modulator output level.
*Serial Gr6: ---- --00,Gr7: ---- --00
-3.7
-3.0
-2.3
dB
PILOT BURST
Amplitude
LPB
T38A
T72
The amplitude of pilot burst which was inserted in
recording.
100
mVp-p
PILOT BURST
Phase
PPB
T38A
T72
The phase of pilot burst which was inserted in
recording.
270
deg
SYNC DET
threshold level
SYNCDC
T38A
T37
The detected DC when there is a video signal input to
T38A and when there is no signal.
2.0
3.5
V
NEM AFC pull-in
range (1)
fNAFC1
T38A
T35
Input a 300mVp-p, 15.6kHz, 5
s width pulse train
(negative polarity).
After increasing the pulse train frequency until the
T35 wave form is disrupted, decrease the frequency
until the T35 wave form returns to normal and let f1 be
that frequency.
fAFC1 = f1-15.625 (kHz)
1.0
kHz
NEW AFC pull-in
range (2)
fNAFC2
T38A
T35
With the initial conditions of the previous item,
Decrease the pulse train frequency until the output is
disrupted, then increase the frequency until the
output returns to normal, and let f2 be that frequency.
fAFC2 = f2-15.625 (kHz)
-2.5
-1.0
kHz
Output level of 2fsc
L2FSC
T56
To measure the amplitude of pin56 with no signal at
pin38 in recording.
200
300
mVp-p
Harmonics of 2fsc
HFSC2
T56
At first to measure the fsc component of pin56.
At last, to compare the ratio between fsc and 2fsc
component with no signal at pin38 in recording.
-10
-15
dB
Harmonics of 2fsc
HFSC3
T56
At first to measure the 3fsc component of pin56.
At last, to compare the ratio between 3fsc and 2fsc
component with no signal at pin38 in recording.
-10
-15
dB
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